125402281235856 has 135 divisors (see below), whose sum is σ = 362650498707627. Its totient is φ = 40451004987840.

The previous prime is 125402281235839. The next prime is 125402281235867. The reversal of 125402281235856 is 658532182204521.

The square root of 125402281235856 is 11198316.

It is a perfect power (a square), and thus also a powerful number.

125402281235856 is a `hidden beast` number, since 1 + 2 + 5 + 4 + 0 + 2 + 281 + 2 + 358 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4165758501 + ... + 4165788603.

Almost surely, 2^{125402281235856} is an apocalyptic number.

125402281235856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

125402281235856 is the 11198316-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125402281235856

125402281235856 is an abundant number, since it is smaller than the sum of its proper divisors (237248217471771).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125402281235856 is an frugal number, since it uses more digits than its factorization.

125402281235856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60282 (or 30139 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 54.

The spelling of 125402281235856 in words is "one hundred twenty-five trillion, four hundred two billion, two hundred eighty-one million, two hundred thirty-five thousand, eight hundred fifty-six".